662599081 has 3 divisors (see below), whose sum is σ = 662624823. Its totient is φ = 662573340.

The previous prime is 662599079. The next prime is 662599097. The reversal of 662599081 is 180995266.

The square root of 662599081 is 25741.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 470499481 + 192099600 = 21691^2 + 13860^2 .

It is not a de Polignac number, because 662599081 - 2¹ = 662599079 is a prime.

It is a super-2 number, since 2×662599081² = 878075084284089122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662599001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12871 + ... + 38611.

It is an arithmetic number, because the mean of its divisors is an integer number (220874941).

Almost surely, 2^662599081 is an apocalyptic number.

662599081 is the 25741-st square number.

662599081 is the 12871-st centered octagonal number.

It is an amenable number.

662599081 is a deficient number, since it is larger than the sum of its proper divisors (25742).

662599081 is an frugal number, since it uses more digits than its factorization.

662599081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51482 (or 25741 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The cubic root of 662599081 is about 871.8001573471.

The spelling of 662599081 in words is "six hundred sixty-two million, five hundred ninety-nine thousand, eighty-one".